The f4d2 technology for the optimized control of our smart stepper or brushless motors is based on an innovative technology f4d2 (Fast Forward Feed Full Digital Drive) which, thanks to the calculations speed for the current regulation performed by the drive microprocessor (for stepper motors or brushless motors) according to an innovative proprietary patented algorithm, allows the motor’s excitation at high efficiency chopper.
The sinusoidal phase currents , filtered of parasitic harmonics provide a silent and smooth rotation of the rotor, maximum torque at every speed and high efficiency in our drives designed for stepper motor or brushless motor control.
On the speed of current regulation of the firmware f4d2 are also based our stepper servo drives with which Ever Elettronica has extended stepper motors control from the traditional open loop to the closed loop in stepless mode with an sinusoidal excitation always synchronous, even in the presence of rapid acceleration of the motor, unlike microstep control mode which does not exclude the loss of step synchronism.
The f4d2 (Fast Forward Feed Full Digital Drive) technology, thanks to the sinusoidal regulation free from parasitic harmonics and at high frequency chopper of phase current, gets from the drive for stepper motor or brushless motor a silent rotation without resonances, maximum torque at every speed and high efficiency.
The servostep drive is realized by retroacting the stepper motor with an incremental or absolute encoder, with a resolution depending on the dynamic precision required by the application.
Generally, with cheap low resolution encoders (400 imp/rev), it is also possible to obtain performances you can get with brushless systems, systems that attempt to simulate the operation of a stepper motor only with a high resolution encoder.
In servostep systems the encoder feedback does not simply consist in the recognition of the step loss during or at the end of the motor movement: it also guarantees the continuous synchronism of the rotor movement.
Stepless phase excitation is a feature of servostep systems with an optimized excitation angle as a speed function, which allows a step resolution higher than the micro-step technique one; as a result, you avoid resonances due to the stepper motor or brushless motor’s structure and a greater positioning accuracy.
The f4d2 (Fast Forward Feed Full Digital Drive) technology maximizes:
- the torque generated as the speed changes
- the motor’s speed of response to load variations
So, it gets excellent dynamic performance in the presence of almost purely inertial load.
This also occurs without the need to perform mechanical resonance research (FFT) and module and phase analysis of brushless motor drives.
Find out more about our full digital drives for stepper motors and brushless motors control!